Repeating-action for grand pianos.



NO. 879,978. PATENTED FEB, 25

A. NICKEL. RBPEATING ACTION FOR GRAND PIANOS. APPLICATION FILED DEC 26 1907 UNITED STATES PATENT OFFICE.

ADAM NICKEL, OF NEW YORK, N. v, ASSIGNOR o WESSELL, NICKEL &- (moss, OF NE" YORK, N. Y.

REPEATING-ACTION FOB GRAND PIANOS.

Specification 0t Letters'P atent,

Patented Feb. 25, 1.908.

Application filed December 26. 1907 semi No. 408.101.

is a sideelevation, partly in section, of my improved grand piano action, showing the normal pos1tion o the parts, and Figs. 2 and 3 are similar views showing consecutive positions of the jack and adjoining parts immediately before and after the hammer has struck the string.

The support 10 fulcrumed at 11 is operated by key 12 through capstan 13, as usual.

' 'To the forward art of support 10 is pivoted at 14 an elbow-s aped jack 15 having a lower forwardly projecting toe 16. Back of fulcrum 14 there 1s secured to support 10 by pin 17 a spring 18 that exerts a pressure against too 16 by meansof an interposed arm 19 pivoted to support 10 at 20. The tension of spring 18 may be adjusted by a regulating screw 21 tapped into support 10 and engaging a heel 22 of the spring. Sprin -arm;19 is padded below toe 16-as at 23. nto arm 19 is tapped a screw 24 forming a projection, the head 25 of which eirtends slightly above toe 16 and is adapted to be operatively engaged by a padded escapement-button 26 carried by regulating rail 27. To accommo-' date screw 24, too 16 may be perforated as at 28, Fig. 2. Near its upper end there is ivoted to jack 15 at 29, the lower end of a ink 30, the upper end of which is pivoted at 31 to a lever 32 fulcrumed to support 10 at 33. Lever 32 is cushioned as at 34 to sustain knuckle 35 'of hammer 36, as usual. Normally there is formed between front of jack 15 and link 30, an obtuse reentrant angle which is defined by a regulating button 37 tapped intojack15 and engaging an abutmerit 38 of support 10-..

In the normal position of the parts, spring arm 19 tilts jack. 15 backwards, sot-hat button 37 is pressed against shoulder 38 (Fig. 1).

pivoted thereto, 9.

Upon the de ression of the key, su port 10 is swung on ulcrum 11 to advance tie hammer towards string 39. When the hammer is within a short distance of the string, screw 24 will engage'button 26, the latter thus causing spring-arm 19 to swing away from -toe 16, so that thereby jack 15 becomes entirely relieved of s ring pressure, '(Fig. 2). Toe 16 will next strfire button 26, so that the top of jack 15 is tilted forward until fulcrum 29 is advanced slightly beyond a line drawn through fulcrums 31 and 14, (full lines Fig. 3). After the hammer has struck the string, it is free to fall back therefrom while the key remains depressed, because it will, by its owng weight, t rough lever 32 further tilt jack 15 and link 30 forward. This tilting movement is limited by the engagement of toe 16 with pad 23 and'may be readily accomplished, because during this movement the jack is entirely uninfluenced by s ring 18. If the key is now partly released, t e s ring which again operatively engages the jack will throw the latter back into its normal position, so that a delicate repeating action in insured. Upon the entire release of the key, all the arts are returned to the position shown in ig. 1.

I claim: l

1. A repeating action for grand pianos provided with a jack, a spring operatively engaging the same and adapted to throw the jack backwards, means for releasing the jack from'the spring, a lever linked to the jack, and a hammer sup orted by the lever, substantially as descri ed.

2. A re eating action for grandv ianos provided wit an elbow-shaped jac a spring I operatively engaging the toe thereof, means for releasing the toe from the spring, a lever linked to the jack, and ahammer supported by the lever, substantially as specified.

3. Are eating action for grand ianos providedwit a support, an elbow-s 2. ed jack s ring mounte on the support and adapted to operatively engage the jack, an esca ement successively engaging the s ring an jack, a lever linked to the jack, an a hammer sup' orted by the lever, substantially as specified 4. Are eating action for rand ianos r0- vided wit a support, anel ow-s aped ack pivoted thereto, a sprin -arm engaging the ]8.Ck, a projection exten ing upwar ly the arm, an escapement successively engagfrom- .951 in the arm a i'o'ection extendiii u l p O Z3 7 C ing' the projection and jack, a lever linked to I sively engaging the projection and jackfa 10 the jack, and a hammer supported by the lever linked to the ash, and a hammer suplever, Substantially as specified. ported by the lever, substantially as specified.

5. A repeating action for grand pianos pr0- Signed by me at New York city, (Manhatvilled with a support, an elbow-shaped jack tnh,) N. Y., this 23rd day of December, 1907. pivoted thereto, an arm also pivoted to the ADM NICKEL. support and engaging the jack, 2. spring en- TUIGSSGSL PHILIP lVIENGES,

wardly from the arm, an escepement succes- CHAS. MI'iHLENFELS. 

